/**
 * Modified MIT License
 *
 * Copyright 2017 OneSignal
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * 1. The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * 2. All copies of substantial portions of the Software may only be used in connection
 * with services provided by OneSignal.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#import <Foundation/Foundation.h>

#import "OneSignal.h"

#import "OSObservable.h"

#import "OSPermission.h"



@protocol OSEmailSubscriptionStateObserver
-(void)onChanged:(OSEmailSubscriptionState*)state;
@end


typedef OSObservable<NSObject<OSEmailSubscriptionStateObserver>*, OSEmailSubscriptionState*> ObservableEmailSubscriptionStateType;
typedef OSObservable<NSObject<OSEmailSubscriptionObserver>*, OSEmailSubscriptionStateChanges*> ObservableEmailSubscriptionStateChangesType;


@interface OSEmailSubscriptionState ()
@property (nonatomic) ObservableEmailSubscriptionStateType *observable;
@property (strong, nonatomic) NSString *emailAuthCode;
@property (nonatomic) BOOL requiresEmailAuth;
- (void)persist;
- (void)setEmailUserId:(NSString *)emailUserId;
- (void)setEmailAddress:(NSString *)emailAddress;
- (BOOL)compare:(OSEmailSubscriptionState *)from;
@end


@interface OSEmailSubscriptionStateChanges ()
@property (readwrite) OSEmailSubscriptionState* to;
@property (readwrite) OSEmailSubscriptionState* from;
@end


@interface OSEmailSubscriptionChangedInternalObserver : NSObject<OSEmailSubscriptionStateObserver>
+ (void)fireChangesObserver:(OSEmailSubscriptionState*)state;
@end


@interface OneSignal (EmailSubscriptionAdditions)
@property (class) OSEmailSubscriptionState *lastEmailSubscriptionState;
@property (class) OSEmailSubscriptionState *currentEmailSubscriptionState;
@property (class) ObservableEmailSubscriptionStateChangesType *emailSubscriptionStateChangesObserver;
@end
